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| author | John David Anglin <dave.anglin@bell.net> | 2014-08-10 09:54:53 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2015-08-05 06:44:54 -0400 |
| commit | 8175e9150a768a1eb135347bdb40b8161cb872dc (patch) | |
| tree | d13db2db78335f4733c172ff938c2634cca22ee2 | |
| parent | 6fef29c020d055f994cf7c4602b01a553b7a9860 (diff) | |
| download | glibc-8175e9150a768a1eb135347bdb40b8161cb872dc.tar.gz glibc-8175e9150a768a1eb135347bdb40b8161cb872dc.tar.xz glibc-8175e9150a768a1eb135347bdb40b8161cb872dc.zip | |
hppa: fix pthread spinlock
| -rw-r--r-- | sysdeps/hppa/nptl/pthread_spin_init.c | 8 | ||||
| -rw-r--r-- | sysdeps/hppa/nptl/pthread_spin_unlock.c | 8 |
2 files changed, 8 insertions, 8 deletions
diff --git a/sysdeps/hppa/nptl/pthread_spin_init.c b/sysdeps/hppa/nptl/pthread_spin_init.c index 865ef2bfac..a49a8468ca 100644 --- a/sysdeps/hppa/nptl/pthread_spin_init.c +++ b/sysdeps/hppa/nptl/pthread_spin_init.c @@ -20,9 +20,9 @@ int pthread_spin_init (pthread_spinlock_t *lock, int pshared) { - int tmp = 0; - /* This should be a memory barrier to newer compilers */ - __asm__ __volatile__ ("stw,ma %1,0(%0)" - : : "r" (lock), "r" (tmp) : "memory"); + /* The LWS-CAS operation on hppa is a synthetic atomic operation + that doesn't provide the type of coherency that we need. Therefore + we force that coherency by using LWS-CAS again. */ + atomic_exchange_rel (lock, 0); return 0; } diff --git a/sysdeps/hppa/nptl/pthread_spin_unlock.c b/sysdeps/hppa/nptl/pthread_spin_unlock.c index a183fed35e..b576649d2a 100644 --- a/sysdeps/hppa/nptl/pthread_spin_unlock.c +++ b/sysdeps/hppa/nptl/pthread_spin_unlock.c @@ -20,9 +20,9 @@ int pthread_spin_unlock (pthread_spinlock_t *lock) { - int tmp = 0; - /* This should be a memory barrier to newer compilers */ - __asm__ __volatile__ ("stw,ma %1,0(%0)" - : : "r" (lock), "r" (tmp) : "memory"); + /* The LWS-CAS operation on hppa is a synthetic atomic operation + that doesn't provide the type of coherency that we need. Therefore + we force that coherency by using LWS-CAS again. */ + atomic_exchange_rel (lock, 0); return 0; } |